Is S37.491A a billable ICD-10-CM code?

Yes. S37.491A is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does S37.491A sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39).

What cannot be coded together with S37.491A?

S37.491A carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S37.491A (S37) and apply to it just the same.

S37.491A

S37.491A — Other injury of ovary, unilateral, initial encounter

Billable / specific codeICD-10-CM

S37.491A is a billable, specific ICD-10-CM code for other injury of ovary, unilateral, initial encounter. It is valid for submission on a claim.

7th character "A" — initial encounter

The appropriate 7th character is to be added to each code from category S37

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above S37.491A

These are not written on S37.491A, but they bind it: a note on a category applies to every code beneath it. Billing S37.491A with anything listed here is a denial.

Written on S37 — Injury of urinary and pelvic organs

obstetric trauma to pelvic organs (O71.-)

Excludes2 inherited from the categories above S37.491A

Also inherited, and the opposite of Excludes1: these conditions are not part of S37.491A, but a patient can have both, so you may code both.

Written on S37 — Injury of urinary and pelvic organs

injury of peritoneum (S36.81)
injury of retroperitoneum (S36.89-)

Risk adjustment

S37.491A does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

S37.491A is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56421Billing and Coding: CT of the Abdomen and Pelvis
A57205Billing and Coding: Oximetry Services

Code history

S37.491A has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share S37.491. If S37.491A is not quite right, the correct code is usually one of these.

Questions about S37.491A

Is S37.491A a billable ICD-10-CM code?: Yes. S37.491A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S37.491A sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39).
What cannot be coded together with S37.491A?: S37.491A carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S37.491A (S37) and apply to it just the same.